Exception.HResult Propiedad

  • Referencia

Definición

Espacio de nombres:
System
Ensamblado:
System.Runtime.dll
Ensamblado:
mscorlib.dll
Ensamblado:
netstandard.dll
Source:
Exception.cs
Source:
Exception.cs
Source:
Exception.cs

Obtiene o establece HRESULT, un valor numérico codificado que se asigna a una excepción específica.

public:  property int HResult {  public:
int get(); protected:
 void set(int value); };
public:
 property int HResult { int get(); void set(int value); };
protected:
 property int HResult { int get(); void set(int value); };
public int HResult { get; protected set; }
public int HResult { get; set; }
protected int HResult { get; set; }
member this.HResult : int with get, set
Public Property HResult As Integer
Protected Property HResult As Integer

Valor de propiedad

Int32

Valor HRESULT.

Ejemplos

En el ejemplo de código siguiente se define una clase derivada Exception que establece la HResult propiedad en un valor personalizado en su constructor.

// Example for the Exception::HResult property.
using namespace System;

namespace NDP_UE_CPP
{

   // Create the derived exception class.
   ref class SecondLevelException: public Exception
   {
   private:
      static int SecondLevelHResult = (int)0x81234567;

   public:

      // Set HResult for this exception, and include it in 
      // the exception message.
      SecondLevelException( String^ message, Exception^ inner )
         : Exception( String::Format( "(HRESULT:0x{1:X8}) {0}", message, SecondLevelHResult ), inner )
      {
         HResult = SecondLevelHResult;
      }

   };


   // This function forces a division by 0 and throws 
   // a second exception.
   void DivideBy0()
   {
      try
      {
         try
         {
            int zero = 0;
            int ecks = 1 / zero;
         }
         catch ( Exception^ ex ) 
         {
            throw gcnew SecondLevelException( "Forced a division by 0 and threw "
            "a second exception.",ex );
         }

      }
      catch ( Exception^ ex ) 
      {
         Console::WriteLine( ex->ToString() );
      }

   }

}

int main()
{
   NDP_UE_CPP::DivideBy0();
}

/*
This example of Exception::HResult generates the following output.

NDP_UE_CPP.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 an
d threw a second exception. ---> System.DivideByZeroException: Attempted to div
ide by zero.
   at NDP_UE_CPP.DivideBy0()
   --- End of inner exception stack trace ---
   at NDP_UE_CPP.DivideBy0()
*/

// Example for the Exception.HResult property.
using System;

namespace NDP_UE_CS
{
    // Create the derived exception class.
    class SecondLevelException : Exception
    {
        const int SecondLevelHResult = unchecked( (int)0x81234567 );

        // Set HResult for this exception, and include it in
        // the exception message.
        public SecondLevelException( string message, Exception inner ) :
            base( string.Format( "(HRESULT:0x{1:X8}) {0}",
                message, SecondLevelHResult ), inner )
        {
            HResult = SecondLevelHResult;
        }
    }

    class HResultDemo
    {
        public static void Main()
        {
            // This function forces a division by 0 and throws
            // a second exception.
            try
            {
                try
                {
                    int  zero = 0;
                    int  ecks = 1 / zero;
                }
                catch( Exception ex )
                {
                    throw new SecondLevelException(
                        "Forced a division by 0 and threw " +
                        "a second exception.", ex );
                }
            }
            catch( Exception ex )
            {
                Console.WriteLine( ex.ToString( ) );
            }
        }
    }
}

/*
This example of Exception.HResult generates the following output.

NDP_UE_CS.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 and
 threw a second exception. ---> System.DivideByZeroException: Attempted to divi
de by zero.
   at NDP_UE_CS.HResultDemo.Main()
   --- End of inner exception stack trace ---
   at NDP_UE_CS.HResultDemo.Main()
*/

// Example for the Exception.HResult property.
open System

let secondLevelHResult = 0x81234567

// Create the derived exception class.
// Set HResult for this exception, and include it in the exception message.
type SecondLevelException(message, inner) as this =
    inherit Exception($"(HRESULT:0x{secondLevelHResult:X8}) %s{message}", inner)
    do
        this.HResult <- secondLevelHResult

// The following forces a division by 0 and throws a second exception.
try
    try
        let zero = 0
        let ecks = 1 / zero
        ()
    with ex ->
        raise (SecondLevelException("Forced a division by 0 and threw a second exception.", ex) )
with ex ->
    printfn $"{ex}"

// This example of Exception.HResult generates the following output.
//
// NDP_UE_FS+SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 and
//  threw a second exception. ---> System.DivideByZeroException: Attempted to divi
// de by zero.
//    at <StartupCode$fs>.$NDP_UE_FS.main@()
//    --- End of inner exception stack trace ---
//    at <StartupCode$fs>.$NDP_UE_FS.main@()

' Example for the Exception.HResult property.
Namespace NDP_UE_VB

    ' Create the derived exception class.
    Class SecondLevelException
        Inherits Exception

        Private Const SecondLevelHResult As Integer = &H81234567
       
        ' Set HResult for this exception, and include it in 
        ' the exception message.
        Public Sub New(message As String, inner As Exception)

            MyBase.New( String.Format( "(HRESULT:0x{1:X8}) {0}", _
                message, SecondLevelHResult ), inner )
            HResult = SecondLevelHResult
        End Sub
    End Class

    Module HResultDemo
       
        Sub Main()
            ' This function forces a division by 0 and throws 
            ' a second exception.
            Try
                Try
                    Dim zero As Integer = 0
                    Dim ecks As Integer = 1 \ zero

                Catch ex As Exception
                    Throw New SecondLevelException( _
                        "Forced a division by 0 and threw " & _
                        "a second exception.", ex )
                End Try
              
            Catch ex As Exception
                Console.WriteLine( ex.ToString( ) )
            End Try
        End Sub

    End Module ' HResultDemo
End Namespace ' NDP_UE_VB

' This example of Exception.HResult generates the following output.
' 
' NDP_UE_VB.SecondLevelException: (HRESULT:0x81234567) Forced a division by 0 a
' nd threw a second exception. ---> System.DivideByZeroException: Attempted to
' divide by zero.
'    at NDP_UE_VB.HResultDemo.Main()
'    --- End of inner exception stack trace ---
'    at NDP_UE_VB.HResultDemo.Main()

Comentarios

HRESULT es un valor de 32 bits, dividido en tres campos: un código de gravedad, un código de componente y un código de error. El código de gravedad indica si el valor devuelto representa información, una advertencia o un error. El código de componente identifica el área del sistema responsable del error. El código de error es un número único que se asigna para representar la excepción. Cada excepción se asigna a un HRESULT distinto. Cuando el código administrado produce una excepción, el tiempo de ejecución pasa HRESULT al cliente COM. Cuando el código no administrado devuelve un error, HRESULT se convierte en una excepción, que el tiempo de ejecución inicia. Para obtener información sobre los valores HRESULT y sus excepciones de .NET Framework correspondientes, vea How to: Map HRESULTs and Exceptions. Consulte Valores HRESULT comunes en la documentación de Windows para obtener una lista de los valores que es más probable que encuentre.

A partir de .NET Framework 4.5, el establecedor de la HResult propiedad está protegido, mientras que su captador es público. En versiones anteriores de .NET Framework, tanto el captador como el establecedor están protegidos.

Se aplica a

Consulte también